Cultivator.



Patented Sept. 2, |902. A. H. KGPPERUD.

C U L T I V A T 0 R.

(Application filed Feb. 20, 1902.)

2 Sheets-Sheet I.

(No Model.)

.lA/VEN TUR JW Z l 'l W/ TN 55555.-

UNITED STATES PATENT OEEICE.

ANDERS H, KOPPERUD, OF BYRON, CALIFORNIA.`

CULTIVATOR.

SPECIFICATION forming part of Letters Patent No. 708,150,dated September 2, 1902. Application tiled February 20, 1902. .Serial No. 94,877. (No model.)

[0 all whom it mat-y concern;

Be it known that I, ANDERS H. KOPPERUD, a citizen of the United States, residing at Byron, Contra Costa county, State of California, have invented certain new and useful Improvements in Cultivators; and I do hereby declare the following to be a full, clear, and exact description of the same.

The present invention relates to improvements in the general class of Vcultivators, but more particularly to what is known as disk harrows. In this lclass of harrows the disks are commonly arranged upon a single axle extending crosswise of the frame or upon two axles arranged at an inclination to each other or V-shaped. With the first-mentioned arrangement the colter-disks cut in thesaine outward direction, which tends to work the harrow to one side or'give a side draft thereto. Again, with this arrangement of the disk the field ofttimes requires reharrowing in order to obtain proper pulverization of the ground. With the second arrangement the eolter-disks cut toward each other at an inward inclination, the inner ends of the axles approaching each other at the center of the harrow-frame. This arrangement of the colter-disks leaves a center ridge to the harrowed ground, which is formed by the twoinner disks.-

The object of the present invention is to provide a disk harrow with two distinct rows of colterv-disks, one being in advance of the other and the rear colter-disks being so arranged as to cut the soil between the forward disks. The disks of the forward and rear line are curved or dished in opposite directions, so that a counter side strain is given to the frame. By this arrangement the lateral strain of the rear colter-disks counteracts the lateral strain of the forward colter-disks, thereby permitting forward travel of the harrow in true line.A

In order tocomprehend the invention, reference should be `had to the accompanying drawings, wherein- Figure 1 is a top plan view of the harrow; Fig. 2, aside view of the harrow, and Fig. 3 is an end View of the machine viewed from the front thereof.

The frame of the harrow consists of the end pieces 1 2 and side pieces 3 4, which pieces are preferably formed of iron. The

end pieces 1 2 are raised above the side pieces 3 4 in order to give clearance for the colters. To the said end pieces is bolted or otherwise secured the beam' 5, which constitutes the vpole of lthe harrow. The frame is strengthened by means of the longitudinal metallic beams 6 6', the forward ends of which are'inwardly bent, so to embrace the pole 5.

The axles 7 8 for the Colfer-disks are suspended from the cross-beams 9 10, which are arranged a distance apart, so as to place one axle in advance of the other. Each crossbeam consists of two angle-plates bolted together, between which plates are secured the head ends of Ithe standards 12. These standards carry bearing-boxes, through which the axles 7 8 extend.

The forward colter-disks 14 are arranged upon the axle 7, and the rear disks 15 are arranged upon axle 8, the disks being held spaced by means of the spools 16. The rear colter-disks 15 are dished or curved in an opposite direction to that of the forward colterdisks 14, and said rear disks are so placed as to cut the soil between the forward disks. By this arrangement a finer pulverization of the soil is obtained than possible by a single row of colter-disks.

The forward cross-beam 9 is pivoted at its,

outer end portion to longitudinal beam 6, while its inner end portion is connected to one end of fulcrumed lever 16, attached to one side of beam 6', by means of connecting-rod 17. The opposite or free end of lever 16 is connected to hand-lever 18 by a draw-rod 19. As thus connected the forward cross-beam maybe swung into different positions through the medium of said hand-lever 18, so as to shift the position of the forward" row of colter-disks. By means of hand-lever 2O the rear cross-beam 10 may have its position changed in accordance with the forward crossbeam. Said beam 10 is pivoted near its inner end to longitudinal beam 6', its outer end portion being connected to fulcrumed lever 21, -attached to one side of longitudinal beam 6, by connecting-rod 22. The free end of the fulcrumed lever is attached to hand-lever 20 by draw-rod 23. By shifting the rear crossbeam the position of the rear row of colterdisks may be changed in accordance with the altered position of the forward row of colter disks. The colter-disks are fastened to their respective axles in the usual manner-that is, by means of a nut being firmly screwed onto the end of axle opposite thnripivoted end of its cross-beam. Thisend of Ythe axles I shall term the free end.

To the free end of axle 7 is secured a casehardened cap 25, which bears against the casehardened curved plate 26 during the working of the machine. This plate is the segment of a circle having the same radius as the are described by the movementl of the axle 7. The end thrust of said axle is taken up by this plate 26, which serves to hold same against end movement. The plate 26 is attached inside the frame at one corner thereol", as shown in the drawings. To the opposite diagonal corner of the frame is attached a case-hardened segment-plate 27, against which bears the case-hardened cap 28. This cap covers the nut on free end of axle 8. Like plate 26, the plate 27 holds axle 7 against end movement. To opposite diagonal outer corners ofthe frame the ilanged colter-wheels 29 30 are secured, which wheels overcome such tendency as may exist for the harrow to work to one side during travel. These wheels are mounted on the end of journals 3l, which journals workin bearing-boxes 32. By means of levers 33 34 the position or inclination of the colter-wheels may be readily changed. Said levers control the colter-wheels through the medium of connections 35. Below the pole of the liarrow is arranged an adjustingwheel 36, which is raised or lowered by means of lever 37. The lower end of this wheel raises the pole and forward end of the frame so as to lift the front row of colter-disks clear of the ground.

The essential feature of the present invention resides in the employment of two independent rows of colter-disks, one arranged in advance of the other. By this arrangement one machine gives a double harrowing to the ground, the equivalent of running a single barrow twice over the surface of the eld. The double row ofcolter-disks secures a liner pulverization than is possible by a single row of colter-disks.

Having thus described the invention, what is claimed as new, and desired to be protected by Letters Patent, is-

1. Adisk harrow comprising a frame, apair of axles suspended therefrom, said axles being arranged one in advance of the other, the axles being pivotally connected at opposite ends to the frame, means connected to the free end of the axles for changing the position thereof, a series of colter-disks secured to each axle, and colter-wheels connected to the frame at diagonally opposite corners.

2. The combination with the frame, of a pair of axles suspended therefrom one in advance of the other, said axles being pivotally connected at opposite ends to the frame, means connected with the free end of each axle whereby the same may be swung into different positions, a series of colter-disks secul'ed to each axle, and segment-plates attached to the frame and against which the free ends of the axles bear.

In witness whereof I have hereunto set my hand.

ANDERS H. KOPPERUD.

Witnesses:

N. A. ACKER, D. B. RICHARDS. 

